module AWS::S3::PrefixAndDelimiterCollection

def as_tree options = {}
  Tree.new(self, { :prefix => prefix }.merge(options))
end

def each_member_in_page(page, &block)
  super
  page.common_prefixes.each do |p|
    yield(with_prefix(p))
  end
end

def list_options(options)
  opts = super
  opts[:delimiter] = options[:delimiter] if options.key?(:delimiter)
  opts
end